<template>
    <div>
      <div>
        <el-input style="width: 200px" placeholder="查询标题" v-model="title"></el-input>
        <el-button type="primary" style="margin-left: 10px" @click="load(1)">查询</el-button>
        <el-button type="info" @click="reset">重置</el-button>
      </div>
      <div style="margin: 10px 0">
        <el-button type="primary" plain @click="handleAdd">新增</el-button>
        <el-button type="danger" plain @click="delBatch">批量删除</el-button>
      </div>
      <el-table :data="tableData" stripe :header-cell-style="{ backgroundColor: 'aliceblue', color: '#666' }" @selection-change="handleSelectionChange">
        <el-table-column type="selection" width="55" align="center"></el-table-column>
        <el-table-column prop="id" label="序号" width="70" align="center"></el-table-column>
        <el-table-column prop="title" label="标题"></el-table-column>
        <el-table-column prop="content" label="内容" show-overflow-tooltip></el-table-column>
        <!-- <el-table-column prop="user" label="发布人"></el-table-column> -->
        <el-table-column prop="time" label="发布时间"></el-table-column>
        <el-table-column label="是否公开">
          <template v-slot="scope">
            <el-switch v-model="scope.row.open" @change="changeOpen(scope.row)"></el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" align="center" width="180">
          <template v-slot="scope">
            <el-button size="mini" type="primary" plain @click="handleEdit(scope.row)">编辑</el-button>
            <el-button size="mini" type="danger" plain @click="del(scope.row.id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>
  
      <div style="margin: 10px 0">
        <el-pagination
            @current-change="handleCurrentChange"
            :current-page="pageNum"
            :page-size="pageSize"
            layout="total, prev, pager, next"
            :total="total">
        </el-pagination>
      </div>
  
      <el-dialog title="公告信息" :visible.sync="fromVisible" width="40%" :close-on-click-modal="false">
        <el-form :model="form" label-width="80px" style="padding-right: 20px" :rules="rules" ref="formRef">
          <el-form-item label="标题" prop="title">
            <el-input v-model="form.title" placeholder="标题"></el-input>
          </el-form-item>
          <el-form-item label="内容" prop="content">
            <el-input type="textarea" v-model="form.content" placeholder="内容"></el-input>
          </el-form-item>
        </el-form>
  
        <div slot="footer" class="dialog-footer">
          <el-button @click="fromVisible = false">取 消</el-button>
          <el-button type="primary" @click="save">发 布</el-button>
        </div>
      </el-dialog>
  
    </div>
  </template>
  
  <script>
  
  export default {
    name: "Notice",
    data() {
      return {
        tableData: [],  // 所有的数据
        pageNum: 1,   // 当前的页码
        pageSize: 5,  // 每页显示的个数
        username: '',
        title: '',
        total: 0,
        fromVisible: false,
        form: {},
        user: JSON.parse(localStorage.getItem('honey-user') || '{}'),
        rules: {
          title: [
            { required: true, message: '请输入标题', trigger: 'blur' },
          ],
          content: [
            { required: true, message: '请输入内容', trigger: 'blur' },
          ]
        },
        ids: [],
        content: '',
      }
    },
    created() {
      this.load()
    },
    methods: {
      changeOpen(form) {
        // 调用更新的接口  更新数据到数据库
        this.form = JSON.parse(JSON.stringify(form))
        this.sendSaveRequest()   // 直接发请求就可以了
      },
      delBatch() {
        if (!this.ids.length) {
          this.$message.warning('请选择数据')
          return
        }
        this.$confirm('您确认批量删除这些数据吗？', '确认删除', {type: "warning"}).then(response => {
          this.$request.delete('/notice/delete/batch', { data: this.ids }).then(res => {
            if (res.code === '200') {   // 表示操作成功
              this.$message.success('操作成功')
              this.load(1)
            } else {
              this.$message.error(res.msg)  // 弹出错误的信息
            }
          })
        }).catch(() => {})
      },
      handleSelectionChange(rows) {   // 当前选中的所有的行数据
        this.ids = rows.map(v => v.id)
      },
      del(id) {
        this.$confirm('您确认删除吗？', '确认删除', {type: "warning"}).then(response => {
          this.$request.delete('/notice/delete/' + id).then(res => {
            if (res.code === '200') {   // 表示操作成功
              this.$message.success('操作成功')
              this.load(1)
            } else {
              this.$message.error(res.msg)  // 弹出错误的信息
            }
          })
        }).catch(() => {})
      },
      handleEdit(row) {   // 编辑数据
        this.form = JSON.parse(JSON.stringify(row))  // 给form对象赋值  注意要深拷贝数据
        this.fromVisible = true   // 打开弹窗
      },
      handleAdd() {   // 新增数据
        this.form = {}  // 新增数据的时候清空数据
        this.fromVisible = true   // 打开弹窗
      },
      save() {   // 保存按钮触发的逻辑  它会触发新增或者更新
        this.$refs.formRef.validate((valid) => {
          if (valid) {
            this.sendSaveRequest()
          }
        })
      },
      sendSaveRequest() {
        this.$request({
          url: this.form.id ? '/notice/update': '/notice/add',
          method: this.form.id ? 'PUT' : 'POST',
          data: this.form
        }).then(res => {
          if (res.code === '200') {  // 表示成功保存
            this.$message.success('保存成功')
            this.load(1)
            this.fromVisible = false
          } else {
            this.$message.error(res.msg)  // 弹出错误的信息
          }
        })
      },
      reset() {
        this.title = ''
        this.load()
      },
      load(pageNum) {  // 分页查询
        if (pageNum)  this.pageNum = pageNum
        this.$request.get('/notice/selectByPage', {
          params: {
            pageNum: this.pageNum,
            pageSize: this.pageSize,
            title: this.title
          }
        }).then(res => {
          this.tableData = res.data.records
          this.total = res.data.total
        })
      },
      handleCurrentChange(pageNum) {
        this.load(pageNum)
      },
    }
  }
  </script>
  
  <style>
  .el-tooltip__popper{ max-width:300px !important; }
  </style>